Rotary carving tool



Oct. 2, 1951 w. E. STOWELL ROTARY CARVING TOOL Filed June 21, 1949INVENTOR. mniL/AM 5.52'0/1/541.

Patented Oct. 2, 1951 UNITED STATES PATENT. OFFICE ;J r

ROTARY CARVING TOOL William E. Stowell, Provo, Utah Application June 21,1949, Serial No. 100,478

1 Claim. (Cl. 29--l03) This invention relates to a rotary carving tool,and has for one of its objects the production of a simple and efficientcarving tool or drill for facilitating the carving or cutting of plasticmaterial and the like, at a radical angle laterally of the normallongitudinal axis of the drill or work, in a manner whereby internaldecorative designs may be carved inwardly of a block or piece oftransparent translucent or othe plastic, and in a direction to the sideof the entrance aperture, to produce a pleasing decorative display.

A further object of this invention is the production of a simple andeflicient rotary carving tool which is provided with one or moreflattened sides to present a longitudinally extending cutting edgeexteriorly of the flutes of the drill or tool, the flutes providingmeans for facilitating the removal or ejection of cut particles from thecutting edge of the tool while the tool is carving or cutting materialsuch as plastic and the like.

Other objects and advantages of the present invention will appearthroughout the following specification and claim.

In the drawing:

Figure 1 is a side elevational view of the improved rotary carving tool,the dotted lines illustrating the portion of the drill which is trimmedor cut-away to provide a tapering point which is triangular in cross-section;

Figure 2 is an enlarged transverse sectional view taken on line 22 ofFigure 1;

Figure 3 is an enlarged transverse sectional view taken on line 3-3 ofFigure 1;

Figure 4 is an enlarged transverse sectional view showing a modifiedtype of tool;

Figure 5 is a perspective view of one type of display piece carved bythe improved tool;

Figure 6 is a fragmentar vertical sectional view of a display pieceillustrating the manner in which leaves and flowers such as are shown inFigure 5 may be carved in a piece of plastic or other material.

By referring to the drawing, it will be seen that l0 designates aconventional drill having conventional flutes or spiral channels I l.The cutting or outer end of the tool or drill I 0 is tapered, preferablyto a point or suitable apex 12 either pointed, rounded, or formed tosuit the type of internal carving to be performed. The cutting or outerend of the tool preferably is provided with three longitudinallyextending flat tapering and converging side faces l3 to define threeconverging cutting edges [4 which are crossed by the spiral channels orflutes I 5. These flutes or channels will provide means for eject- 2ing, discharging or removing particles of the plastic or other materialwhich are cut by the tool while internally carving the WOIk. ormaterial.

Various internal decorative or artistic designs may be cut or carved, asat I 6, within the plastic block, piece or section IT, to create apleasing display and these out designs may be stained, colored or tintedto provide a variety of color displays within varied shapes of material,one type being shown in Figure 6.

As shown in Figure 4, the drill [8 of a conventional type may beprovided at its cutting end with only one flat face [9 defining cuttingedges 20 and 2| which extend longitudinally of one end of the drill l8.The drill I8 is provided with the conventional spiral channels or flutes22.

It is important to note that the present invention primarily embodies aconventional drill having a spiral flute or flutes in the peripherythereof, the cutting end of the drill being longitudinally flattened andtapered to define a plurality of converging cutting edges which edgesare crossed at spaced intervals by the spiral channels or flutes toconvey chips or cut particles cut from the work, plastic or othermaterial, outwardly of the hole which is being cut. Furthermore, due tothese tapering flat sides at the point ed cutting end of the tool andthe cutting edges l4 in the form shown in Figures 1 and 2, the tool isadapted to cut sideways or laterally of the entrance opening tofacilitate the internal carve ing of material in decorative designs,such as flowers, leaves, and the like.

By carefully noting Figure 1 it will be seen that the tool is providedwith a plurality of relatively flat elongated converging faces merginginto an apex point thereby defining a plurality of longitudinallyextending converging cutting edges which terminate in said apex point atone extremity of the tool. It should be further noted that the spiralchannel II extends angularly across the cutting edges at an incline andcrosses the cutting edges H at a plurality of locations of a modifiedform is shown in Figure 4 wherein two cutting edges M and 22 are shownand are formed by providing only one flat face l9.

By means of the tool which I have devised it is obvious that new andnovel designs in internal carving may be created and the formation ofsaid designs greatly facilitated, due largely to the fact that lateralor side cutting is possible owing to the longitudinal cutting edges ofthe tool and the fact that the tool will not clog. The flutes will carrythe cut particles away from the work and away from the cutting edges ofthe tool.

The length of the tapering point which preferably is triangular incross-section, may be made of any desired proportion with respect to thelength of the drill, depending upon the nature I of the work to beperformed thereby, Thetool, such as the tool It], is adapted to becarried by any suitable rotar tool holder or drill bit holder of aconventional type. The same is true of the tool [8.

It should be understood that certain detail changes in, the constructionof the tool may be employed without departing from the spirit of theinvention, so long as such changes tall within the scope of the appendedclaim.

Having described the invention, what is claimed as new is: V

A rotary carving tool comprisin a body havin an elongated taperingcutting end, said, cutting end having a plurality of elongatedrelatively flat tapering and converging faces merging into .an apexandpenetrating point at oneend of said tool thereby defining a pluralityof longitudinally ex- 4 tending cutting edges terminating in said apexpoint at one extremity of the tool, and said body having a spiralchannel angularly crossing said cutting edges at an incline and at aplurality of locations within the lengths of said cutting edges andextending from said apex point to the opposite end of the tool therebydefining a materialconveying channel throughout the length of the toolfor conveying cut material away from the cutting edges andlongitudinally of the body to prevent clogging of the tool duringoperation.

WILLIAM E. STOWELL.

REFERENCES CITED The following references are of record in the file ofthis patent:

I UNITEDVSTATES PATENTS Number 8 OTHER REFERENCES Popular Science,August 1947, pages -164.

